皮皮学，免费搜题
登录
搜题
【判断题】
被子植物的雄蕊和雌蕊，分别产生精子和卵，精卵结合发育成胚，所以是被子植物有性生殖的器官。A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】A．though B．as C．much as D．ever since
【简答题】A．and after B．or after C．ever since D．or since
【简答题】公比为 3 2 的等比数列{我 n }各项都是正数，且我 3 我 我我 =我6，则log 2 我 我6 =______．
【单选题】(Ever since) the world (began) nations (have difficulty) in (keeping) peace with their neighbors.
A.
Ever since
B.
began
C.
have difficulty
D.
keeping
【单选题】(Ever since) the world (began), nations (have difficulty) (in keeping) peace with their neighbors.
A.
Ever since
B.
began
C.
have difficulty
D.
in keeping
【简答题】Ever since 1990, the Greens________(live) a peaceful life in this village.
相关题目：